If there are multiple voice VLANs configured on a port, LLDP-MED advertises the voice VLAN having the lowest VID.

The voice VLAN port membership configured on the switch can be tagged or untagged. However, if the LLDP-MED endpoint expects a tagged membership when the switch port is configured for untagged, or the reverse, then a configuration mismatch results. (Typically, the endpoint expects the switch port to have a tagged voice VLAN membership.)

If a given port does not belong to a voice VLAN, then the switch does not advertise the VLAN ID TLV through this port.

The QoS and voice VLAN policy elements can be statically configured with the following CLI